Design a massive circular colosseum...

Design a massive circular colosseum with a central round arena, surrounded by tiered stone stands that fully encircle the space. The structure should be gothic in style, using dark, weathered stone, pointed arches, ribbed supports, and repeating pillars to emphasize height and grandeur. Carved details, tracery, and deep shadows should give the architecture a heavy, imposing presence, with torches or warm light sources contrasting against the cold stone. At the highest point, include a clearly dominant VIP viewing box elevated above the stands. It should feel throne-like and authoritative, framed by ornate gothic arches and columns, possibly marked with banners or sigils to set it apart. The overall mood should be ancient, ceremonial, and powerful—built for spectacle rather than decay.